Is drinking coffee harmful to health?

Caffeine in coffee is difficult to dissolve in cold water, but easy to dissolve in hot water. Caffeine can stimulate the cerebral cortex, eliminate drowsiness, increase feelings and thinking, and can be used as a cardiotonic to regulate heart function. It also has the functions of dilating renal blood vessels and diuresis. However, it is not only coffee that contains caffeine. Usually a cup of coffee contains 60-65 milligrams of caffeine. However, if you consume too much caffeine, you are prone to tinnitus and myocardial hyperfunction (the heart beats rapidly and the pulse frequency increases). And the pulse is uneven, so you must drink coffee in moderation.

Coffee is recognized as a healthy drink, but drinking coffee must be reasonable and scientific in order to be beneficial to health, and it should be timely and appropriate.

A drink after getting up in the morning is to refresh yourself, and a little at work during the day can refresh you. At this time, the coffee can be a little stronger. It is best to drink coffee after meals or in the evening. Coffee or tea has a refreshing effect, but it is not suitable for use with meals and should be drunk after meals. Some friends like coffee very much, but they are afraid that they will get angry if they drink coffee often. We often see many people order coffee. This way of drinking coffee is unhealthy. A cup of white water should be drunk with coffee, which has two advantages: first, take a sip of white water before drinking coffee to wash away the odor in your mouth, and then you will feel mellow. Second, because of the diuretic function of coffee, drink more white water, increase urination and promote renal function. In this way, you can not only taste delicious coffee, but also do not have to worry about getting angry. This is really killing two birds with one stone.

Black coffee-the best health messenger

The most beneficial substance in coffee is caffeine. In various ways of drinking coffee, drinking pure black coffee can best retain beneficial ingredients and is most beneficial to health. Here are some of its functions:

Refreshing caffeine stimulates the central nervous system, rejuvenates the brain and improves work efficiency;

Caffeine stimulates gastrointestinal secretion of gastric acid to prevent gastroptosis.

Diuretics and dehumidifying caffeine can increase urine volume and promote renal function.

Linoleic acid contained in coffee for promoting blood circulation and removing blood stasis can hemolyze and prevent thrombosis, enhance vasoconstriction ability and reduce the probability of stroke.

Caffeine can inhibit parasympathetic nerve and reduce the attack of asthma.

Caffeine for removing odor contains tannin, which has a strong adsorption capacity for taste. If your home has just been renovated, make a pot of coffee indoors or put the cooked coffee beans indoors, and the smell will soon disappear.

Coffee can lose weight and resist aging. Lightly roasted coffee contains more caffeine, which is beneficial to lose weight. Black coffee has antioxidant effect, which is helpful for anti-cancer and anti-aging.

Drinking coffee in moderation is good for human health. Under normal circumstances, the human body can consume nearly 500 to 600 milligrams of caffeine every day, which is equivalent to about 5 cups of coffee. In this range, there will be no side effects. But the metabolism of pregnant women is a little slow, so drink less. Coffee is an indispensable healthy drink for us.

Coffee and health

When it comes to coffee, people think of caffeine, which is a mild stimulant in coffee. It can improve the sensitivity and attention of the human body, accelerate the metabolism of the human body and improve the mental state and physical quality of the human body. At present, caffeine has been found in about 60 kinds of plants, of which tea and coffee are the best known.

What kind of people are not suitable for drinking coffee

Coffee contains caffeine, and whether it reacts to caffeine depends on different people. For example, some people are allergic to pollen, while others are not suitable for eating seafood. And these two situations will have no effect on most people like you and me. As for how much coffee to drink every day, in some coffee-consuming countries, people consume about 250-600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. Therefore, you can drink 4- 10 cups of instant coffee every day.

What effect does drinking coffee have on health?

Your main concern is whether the caffeine contained in coffee has an impact on health. In fact, caffeine is a mild stimulant in coffee, which can improve human sensitivity and attention, accelerate human metabolism and improve human mental state and physical fitness. At present, caffeine has been found in about 60 kinds of plants, of which tea and coffee are the most widely known. In some coffee-consuming countries, people consume about 250-600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body.

You cannot drink too much coffee every day.

People often ask, how much coffee is excessive? In some coffee-consuming countries, people consume about 250 to 600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. Because the caffeine content in a cup of coffee (150ml) is usually:

-Coffee powder: about 80-90 ml.

-Instant coffee: about 60 ml.

In some coffee-consuming countries, people consume about 250-600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. The caffeine content in a cup of instant coffee (about 150 ml) is generally about 60 mg, so drinking 4- 10 cups of instant coffee every day will not be excessive.

The efficacy of coffee

Alcohol or tobacco can make people feel intoxicated and stimulated, and caffeine can also make people feel excited. Caffeine can stimulate the central nervous system or muscles, which can make muscles or fatigue recover, improve work efficiency, have a sober effect and make the brain more active and sensitive.

On the other hand, it can also improve heart function, dilate blood vessels, have good blood circulation, have a calm headache and feel comfortable. And asthma can inhibit the excitement of parasympathetic nerve by stimulating sympathetic nerve. Other coffee also helps digestion, especially when eating too much meat, which can promote digestion and prevent gastroptosis. Because caffeine can break down fat, westerners definitely want to drink coffee after eating energy-enhancing food. Caffeine can not eliminate garlic flavor, but also contains betel nut, so coffee is an indispensable drink after taste compensation cooking.

In addition, coffee also has a deodorizing effect. The residue brewed with ground coffee can be dried in a container and can be used as a deodorant in a refrigerator or shoe box. Sprinkling on the ashtray can also eliminate the smell of tobacco. Coffee can also be used to hide the taste. For example, instant coffee is melted with boiling water, so that its taste can be stained with meat, and it can become a sweet and delicious meat dish.

Coffee contains a lot of caffeine, will it affect your health? Maybe some people will have such concerns. However, the amount of two or three cups of coffee is no problem. On the contrary, drinking coffee in moderation is effective for the body. Understand coffee correctly, so that everyone can drink coffee happily and enjoy coffee time!

The influence of coffee on people's mood

Recently, Professor A.P. Smith of the University of Bristol in the United Kingdom published his ten-year report on the influence of coffee on brain nerves, especially the influence of coffee on discrimination. Their discrimination and alertness were measured 30 minutes before and after drinking coffee. Smith found that after drinking a cup of coffee, they became more alert and more focused. Professor Smith said that coffee can really refresh you, especially when you don't get enough sleep. If a cold makes you unable to sleep well or suffer from insomnia, and you have to concentrate on going to work or coping with exams during the day, then drinking a cup of coffee will definitely promote your alertness and help you tide over the difficulties. Coffee will stay in the body for 2 to 5 hours, so coffee has a long-term refreshing effect. Further experiments show that ordinary people can absorb 300 mg (about three cups of brewed coffee) of caffeine every day, which will have the following effects on a person's alertness and mood. However, when caffeine exceeds 400 mg (four cups), it will bring side effects, such as bad mood and irritability, which will invade others and bring trouble. If you only want to take polyphenols from coffee to resist oxidation, you just need to go to "fdecaf" coffee!

Studies have found that people who drink coffee are less likely to develop Parkinson's disease. Scientists at the Veterans Management Medical Center in Honolulu, Hawaii, found that people who don't drink coffee are five times more likely to develop Parkinson's disease than those who drink more than five cups of coffee a day. Researchers have followed more than 8,000 men for 30 years, and their findings have been published in the Journal of the American Medical Association. Parkinson's disease (PD) is an senile disease with nervous system pathological changes, and its typical symptoms include tremor, stiffness and decreased voluntary activities of limbs. It is not clear why researchers may reduce the risk of Parkinson's disease by drinking coffee. But they speculate that caffeine contained in coffee may play a role in preventing nerve cells that cause Parkinson's disease from being damaged. Scientists point out that their current results are preliminary and need further research to confirm. They stressed that it is too early to recommend drinking coffee to treat Parkinson's disease.

Coffee and prevention of gallstones

Delicious coffee is a refreshing drink, and the latest research also found that every few cups of coffee can prevent gallstones. According to the latest issue of the Journal of the American Medical Association, researchers at Harvard University in the United States found that compared with men who don't drink coffee, men who drink two or three cups of coffee have a 40% lower risk of gallstones. If they drink more than four cups of coffee a day, the risk of gallstones will drop to 45%. However, decaffeinated coffee has no such effect. Only caffeinated coffee can stimulate gallbladder contraction and reduce cholesterol which is easy to form gallstones in bile. Other drinks such as tea and cola also contain caffeine, but because the caffeine content is lower than that of coffee, the same effect cannot be achieved.

Antioxidant and cardioprotective functions of coffee

Besides refreshing, coffee also contains polyphenols, which not only has antioxidant effect, but also has cardiovascular protection function. Recently, the food chemistry seminar at the annual meeting of the American Chemical Society did have new scientific evidence to prove that coffee contains powerful antioxidants and has the function of protecting the heart and blood vessels. The study was conducted by Scranton University in Pennsylvania, USA. These polyphenols, sometimes called flavonoids, are powerful antioxidants, which can resist oxidation and anticoagulation.

Coffee and Prevention of Radiation Damage

Radiation damage has become a prominent pollution and harm at present. Especially the radiation of household appliances: such as people who operate the phone for a long time, microwave ovens and televisions at home, etc. Especially for pregnant women, radiation has affected the health of the next generation. Reports in this regard are not uncommon. Indian scientists have found that coffee can protect experimental mice from radiation damage and may have the same effect on humans. Researchers at the Baba Atomic Research Center in India found that 70% of experimental mice injected with caffeine were still alive after receiving high-dose radiation (usually fatal) for 25 days, while all mice without caffeine died. Kaye Biliqiao, who led the study, said that this discovery may also apply to humans. He said: "Studies do show that coffee may help prevent injuries."

Can coffee cause calcium loss?

In recent years, people in China have paid more and more attention to calcium loss and osteoporosis, and they are also confused about coffee. As for the relationship between caffeine intake and osteoporosis, it is still under continuous study. At present, there is no direct evidence that caffeine can cause osteoporosis, but some studies have pointed out that caffeine can increase calcium excretion. Therefore, coffee lovers are advised to eat more high-calcium foods to supplement calcium, such as preparing cheese slices or cheese cakes with coffee, which can not only supplement calcium, but also make coffee more delicious.

Those people are not fit for coffee?

Patients with cerebral hemangioma are not suitable for drinking coffee, and patients with heart disease should drink coffee without or with low caffeine, because caffeine will increase heart rate and cause heart hypoxia. In addition, patients with skin diseases and stomach diseases should drink less coffee as far as possible, so as not to make their condition worse because of excessive drinking. People with diabetes should also avoid drinking coffee containing too much polysaccharide, so as not to aggravate the condition. The US Food and Drug Administration (Fda) issued a statement advising pregnant or potential pregnant women to reduce caffeine intake. Because pregnant women metabolize caffeine about twice as fast as non-pregnant women in the middle and late pregnancy, and caffeine will also enter the fetus through the placenta, and it will also flow into the baby through breastfeeding. In addition, many studies have failed to prove that moderate caffeine will have adverse effects on the fetus, and there is no medical report prohibiting pregnant women from drinking coffee. Pregnant women and breast-feeding women are still advised to consume caffeine more carefully. In short, if you find yourself feeling uncomfortable after drinking coffee, you should stop drinking coffee for a while, then start with a small amount and change the drinking method.

Coffee is a beauty killer?

So far, no research results show that caffeine in coffee is harmful to beauty.

On the contrary, moderate caffeine can accelerate metabolism, promote digestion, improve constipation and improve rough skin.